System and method for managing mobile originated message in network

A system for managing a mobile originated (MO) message for a user equipment (UE) moving between a first network and a second network, the system comprising:

• a receiving unit configured to receive a connection setup request from the UE and send an acknowledgment of the connection setup request to the UE;
• a processing unit coupled to the receiving unit and is configured to:
• determine if the UE is connected to the first network or to the second network;
• when it is determined that the UE is connected to the first network, then performing following steps:
• send, by the UE, an MO message to a session management function (SMF);
• forward, by the SMF, the received MO message to a network exposure function (NEF);
• forward, by the NEF, the MO message to an application function (AF);
• send, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forward, by the NEF, the acknowledgement signal to the UE (102) via the SMF
• when it is determined that the UE is attached to the second network, then performing following steps:
• send, by the UE, an MO message to a mobility management entity (MME);
• forward, by the MME, the received MO message to a service capability exposure function (SCEF);
• forward, by the SCEF, the MO message to the NEF;
• forward, by the NEF, the MO message to an application function AF;
• send, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forward, by the NEF, the acknowledgement signal to the SCEF;
• and
• deliver, by the SCEF, the acknowledgement signal to the UE via the MME.

A user equipment (UE) moving between a first network and a second network, wherein the first network and the second network comprising one or more network elements for managing a mobile originated (MO) message for the UE, the one or more network elements configured for:

• determining if the UE is connected to the first network or to the second network;
• when it is determined that the UE is connected to the first network, the one or more network elements are configured for performing following steps:
• receiving, from the UE, an MO message by a session management function (SMF);
• forwarding, by the SMF, the received MO message to a network exposure function (NEF);
• forwarding, by the NEF, the MO message to an application function (AF);
• sending, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forwarding, by the NEF, the acknowledgement signal to the UE via the SMF;
• when it is determined that the UE is attached to the second network, the one or more network elements are configured for performing following steps:
• receiving, from the UE, an MO message by a mobility management entity (MME);
• forwarding, by the MME, the received MO message to a service capability exposure function (SCEF);
• forwarding, by the SCEF, the MO message to the NEF;
• forwarding, by the NEF, the MO message to an application function AF;
• sending, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forwarding, by the NEF, the acknowledgement signal to the SCEF;
• and
• delivering, by the SCEF, the acknowledgement signal to the UE via the MME.

A computer program product comprising a non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to perform a method for managing a mobile originated (MO) message for a user equipment (UE) moving between a first network and a second network, the method comprising:

• determining if the UE is connected to the first network or to the second network;
• when it is determined that the UE is connected to the first network, then performing following steps:
• sending, by the UE, an MO message to a session management function (SMF);
• forwarding, by the SMF, the received MO message to a network exposure function (NEF);
• forwarding, by the NEF, the MO message to an application function (AF);
• sending, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forwarding, by the NEF, the acknowledgement signal to the UE via the SMF;
• when it is determined that the UE is attached to the second network, then performing following steps:
• sending, by the UE, an MO message to a mobility management entity (MME);
• forwarding, by the MME, the received MO message to a service capability exposure function (SCEF);
• forwarding, by the SCEF, the MO message to the NEF;
• forwarding, by the NEF, the MO message to an application function AF;
• sending, by the AF, an acknowledgement signal to the NEF after receiving the MO message;
• forwarding, by the NEF, the acknowledgement signal to the SCEF;
• and
• delivering, by the SCEF, the acknowledgement signal to the UE via the MME.